Large pore synthetic polymer membranes

Details Large pore synthetic polymer membranes Large pore synthetic polymer membranes

B - Operations, Transporting

01

D

B01D 69/02 (2006.01) B01D 61/14 (2006.01) B01D 67/00 (2006.01) B01D 71/68 (2006.01) B32B 5/32 (2006.01) B32B 7/02 (2006.01) C12H 1/065 (2006.01) G01N 33/543 (2006.01) G01N 33/558 (2006.01)

Patent

CA 2161338

Highly asymmetric polymeric membranes with large pores which yield bubble points in the range of 0.5 to 25 psid and superior flow char- acteristics. The membranes can be cast from both metastable dispersions and from homogenous casting formu- lations. The technique of synthesis involves exposure of the cast mem- brane to humid air to create large sur- face pores on the exposed side.

L'invention se rapporte à des membranes polymères très asymétriques, à pores larges, qui créent des points de bouillonnement compris entre 0,5 et 25 psid et qui ont des caractéristiques d'écoulement supérieures. Les membranes peuvent être coulées à partir à la fois de dispersions métastables et de compositions homogènes de coulée. La technique de synthèse consiste à exposer la membrane coulée à l'air humide afin de créer des pores larges en surface sur le côté exposé.

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